Is it wise to stock up any 5L pronounceable .com left?

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Almost all good ones have been taken but still quite some left, do you think if it's wise to stock up and keep them for like 5 - 10 years? Are they bound to appreciate 5 - 10 years later? Seeing the trends for 4L pronounceables, I'm quite confident that 5L ones would do but still. 5L is 26 times...